Finally after 2 years of waiting and all windows updates i found a good working solution
It didn't work (bfsvc.exe %windir%\boot /v)
It also didn't work (diskpart select disk 0 select partition 1 assign letter=s: Keep the diskpart window open don't close it yet Open another Admin Command Prompt and overwrite the files in s:\efi\microsoft\boot\fonts with your good Truetype files. Or if you prefer rename the old ones to *.bak and then copy your good files here. Back in the diskpart window remove letter=s:)
But this WORKED (plug in a usb stick example e:, and your disk example c:
1) open cmd in administrative rights
2) type: manage-bde -protectors -add c: -recoverykey e:
so this saves a key to your thumb drive
when restart you will see a normal screen with text!
if you want to add or remove password or recoverykey use the same command
example manage-bde -protectors -delete c: -password
the commands somehow corrects all text
but you can do it also in another way . by rightclick on disk> manage bitlocker> turn off
then enable again but don't give password. just use a usbdrive to save the key
then use command to add password if you want!
see your protectors with the command: manage-bde -status
there you can see the protectors used as: password, recoverykey ecc